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Finding the Fourth Proportional to 167,313.50, 230,982.64 and 128,989.06

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Solution

The fourth proportional to 167,313.50, 230,982.64 and 128,989.06 is: 178,074.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,313.50 : 230,982.64 = 128,989.06 : x
  2. Step 2: Convert to fraction form
    167,313.50/230,982.64 = 128,989.06/x
  3. Step 3: Cross multiply
    167,313.50x = 230,982.64 × 128,989.06
  4. Step 4: Simplify right side
    167,313.50x = 29,794,232,709.99
  5. Step 5: Solve for x
    x = 29,794,232,709.99/167,313.50
  6. Step 6: Final answer
    x = 178,074.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.